Port Forwarding On A Ubee Router (Please Help)

[Nikson]

this is everything i put is it right? Because i've tried everything else and it doesn't seem to work

Local IP
xxx.xxx.x.xx
Local Start Port
27015
Local End Port
27016
External IP
xxx.xxx.x.xx
External Start Port
27020
External End Port
27021
Protocol
Description
gmod
Enabled

BTW which should i use the ethernet ipv4 or the wireless?? This is for a gmod server